Adhesive-applying device.



No. 817,559. PATENTBD A1311. 1o, 1906.

0. HESSER. ADHESIVE APPLYING DEVICE.

APPLICATION FILED MAYL, 1905.

2 SHEETS-SHEET 1.

N0- 81'7559 RATENTED APR.10, 1905.

0. BESSER. ADHESIVE APPLYING DEVICE.

APPLIUATIOH FILED MAY 4. 1905.

2 SHEETS-SHEET 2.

Specification of Letters Patent.

Patented April 10, 1906.

Application tiled May 4, 1905. Serial No. 258,814.

.To (LZ 're/1,0m t may concern:

Be it known that l, OTTO HESSER, a citizen of the Kingdom of Wrtemberg,German Empire, residing at Cannstatt, Wrtemberg, have invented certainnew and useful Improvements in AdhesiveeAp lying =Devices; and l dohereby declare the ollowing to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to whichit appertains to make and use the same.

The gumming apparatus hitherto ernployed, for instance, inaper-bag-making machines and the like ave the drawback that if for anyreason a sheet of paper is not fed up the movement of the gumming-stampmust be stopped by hand. 1f for any reason this is neglected, an aplication of gum is made on the support ofbthe. sheet in the absence ofa sheet of paper, on which support, then, the next sheet which is fed upremains adherent, which subsequently necessitates the stopping of themachine and a thorough cleaning of it or, rather, of the respectivegummed place. Spoiled goods are thereby produced and also much timewasted before the machine can be again set going. It is also notunlikely that with careless handling of the machine delicate parts ofthe same may be damaged. Such machines always, however; require aconstant and wearying vigilance on the part of the person attending t-othe machine as regards the gumming apparatus, thus placing greatresponsibility on such person. Now this invention entirely removes theser'lrawbacks.

The object ol' the invention is attained by a mechanism forautomatically preventing any application of gum if the sheet of paper benot fed up to the gumming-place for any reason. This mechanismsubstantially consists of a feeler or key influenced by the sheet ofpaper, which key is so connected with the means for arresting thegumming plate or bar that as soon as the key by encountering the flatsheet of paper is Afired the arresting mechanism is released and anapplication of gum takesl place. If no sheet of pa er is present, thekey or feeler makes a onger course and passes through the platesupportthe stop meching the pa er sheet, whereby anism of t e guramingbar or plate is set in actionthat is to say, no application of gumgumming plate or takes place. l/Vhen the bar is moved forward, its lowersurface rubs during the movement on a rotating gumming-roller for thepurpose of taking up gum, and it is then automatically turned ninetydegrees and pressed with its gummed side on the sheet of paper. In .itsreturn movement it is also again automatically turned back ninetydegrees.

The accompanying drawings illustrate one practical embodiment of theinvention. y

Figure 1 is a side view; Fig. 2, another side view turned ninety degreesto Fig. 1, and Fig.

3 a plan view. Figs. 4 to 7 are on an enlarged scale. Fig. 4 shows apartial side view of Fig. 2; Fig. 5, a partial plan view of Fig. 3, andFig. 6 a partial side view of Fig. l. Fig. 7 is a section of the tableon which the paper sheets are laid, and from this view three differentpositions of the key or feeler are also shown-namely, in the pressed-upposition, (full lines,) resting on the paper sheet, (lino dotted lines,)and engaging in the recess of the table, (double line dotted.)

ln the form of construction shown it is assumed that the feed of thepaper sheet 1 onto the obliquely-placed table 4, held on an arm 2, takesplace by means of rotary feed-rollers 3. The sheet is then drawn byfolding-plates 5, mounted on an endless intermittentlymoved chain,through a slot 4 of the table, and at the next stopping-place or stationthe gum for the longitudinal fold of this sheet is applied.

It is assumed as self-evident that the gumming apparatus, together withthe apparatus for automatically stopping it, may be employed at anyother suitable stopping-place or station of a machine for making paperbags or may be employed for any other suitable purposes,

The gumming bar or plate 6 is mounted by means of arms 9 on a shaft 10,which is revolubly mounted on a carriage 11, horizontally movable on aguide-bar 12, and by means of a spiral spring 24, actingcircumferentially and mounted on the shaft 1l), is retained in a giventurning position and returned to said position, in which the gummingplate or bar lies vertically under its shaft 10. A crank 18, thelaterally-projccting pin 17 of which engages in an upperhorizontally-disposed groove 16a in a vertical guide-plate 58, whichplate forms one piece with the bearing-standards or supports 23 or maybe separately attached thereto, is mounted on one end of the Shaft 10,

IOO

lying diametrically to the stamp 6. 11o f llhe groove 16ti is at eachend connected with a groove 16, which is also horizontal and is locatedbeneath the groove 16" by means of obliquely=running grooves 16" and 16,respectively, of which the rear groove 16 is shut ofi" from the groove16 by means of the arm 19 of a movable tongue 19. A fixed tongue 57 runsfrom the front inclined groove 16b in the space of the groove 16. Thetongue 19 is mounted on a pin 20, pivotally mounted in the plate 58, andcarries on the other side a lever 21, on which a spring 22 acts in sucha Way that the arm 19*1 usually closes the groove 16 from the groove16". The groove 16 of the plate 58 is limited in front by a flatguide-arm 25, which bears with its bend 26 above against the plate 58.The arm 25 is ivotally mounted on the pin 27 and proonged to the rear bymeans -of a lever 28, which may be adjusted by means of two aliningset-screws 29. By this means the arm 25, which forms the lower wall ofthe slot 16, may be vertically adjusted in order that the pin 17 may beraised or lowered and the positlon of the gumming bar or platecorrespondingly adjusted in accordance with the dimensions of the paper,sheets, or bags.

The forward movement of the gummingplate takes place by the movement ofthe carriage 11 on its guide-bar 12 by means of a push-rod 30, which isreturned by elbow-lever 31 to the initial position by means of a cam a,mounted on the driving-shaft 32, after being released by means of aspring 33, constantly acting on the lever 3 1 and is moved forward untila lug 34, mounted on the lever 31, encounters an adjustable stop 35,placed on thebearing support or frame 13 and limiting the forwardmovement of the gummingplate. In moving forward the gummingplate 6 firstpasses over a gumming-roller 7, constantly rotating in a gum-container8, and takes upA gum, and then the pin 17 of the crank 18, which pin isfirst sliding in the groove 16a, passes into the inclined groove 16,presses the arm 198L of the tongue 19 aside, and in its end positioncomes to rest in the slot 16, while the gumming-plate 6 has thehorizontal position shown in dotted lines in Fig. 4, and can then applythe gum to the sheet. The return of the gumming-plate then takes placeby the action of the eccentric a, the pin 17 of the crank 18 beingconducted back in the groove 16 under the arm 19a of the tongue 19 andencountering the oblique tongue 57, engaging in the groove 16, risingfrom thereupward and then again assuming its original position, thegummingplate being again turned back simultaneously ninety degrees andlying at the end of the return movement again under the shaft 10.

With the object of applying gum-and preventing its application when nopaper sheet is fed up, the following mechanism is employed. @ne arm 36of an elbow-shaped pawl amata engages in a recess 30EL on the pusher-arml36 of the gunnning-carriage 11, and the other arm 38 of said pawl isallowed to move in order to release the arm 36 from the recess in casethe gum or adhesive is to be applied or is held from movement in casethe gum or adhesive is not to be applied. A slide 42 is movably mountedin the upper plate of the bearing-support 45 and pivotally connectedwith an elbow-lever 43, Fig. 2, 'which is held by a spring 44 in a givenposition and is displaced out of such position by means of an eccentricorcam b, mounted on the drivingshaft 32. 0n this slide 42 a'second slide39, moved with the former, is mounted, which second slide is held fastto the former, but transversely displa'ceable by means of screws passingthrough its slots 40. By means of this slide 39, which lies in front ofthe arm 38 of the catch-pawl 36 38, the latter is released as soon as asheet. of paper 1 lies on the feedtable 4, the pawl 36 being turned byencountering the arm 38 in such a Way that no impediment stands in theway of the forward movement offthe gumming-plate. If, however, no sheethas been conveyed onto the table 4, a lateral displacement of the slide39 takes place in such a way that on the forward movement of the slide42 and the slide 39 the recess 41 of the latter comes to lie exactly infront of the arm 38 of the stop-pawl, and the latter is notreleased-that is to say, no displacement of the gumming-plate can takeplace. The inward movement of the slide 39 is limited by a pin 47. Thelateral displacement of the slide 39 is operated by the feeler or key 54acting on the sheet unless no sheet is laid on the table 4. The key 54is mounted, by means of an arm 53, on a shaft 50, which is retainedpivotally on the bearings 51. On the shaft there is also mounted anelbow-lever 48, the horizontal arm of which is usually raised by meansof a bar 49, vertically movable by means of an eccentric c, when the key54 assumes its position of repose, as shown in full lines, for instance,in

ig. 7. On the sinking of the bar 49 the shaft 50, in consequence of theaction of a spring 56 on the key 54, is turned until the key or feelerrests on the paper sheet. In this position the lever 48 lies near theslide 39, without, however, moving the same. When a paper sheet isplaced on the table, it'opposes such a resistance to the feeler that thelatter cannot enter the recesses of the feed-table 4. If, however, nosheet is placed on the table, the key, in consequence of the action ofthe spring 56, executes a further movement into the recesses 51, wherebythe shaft 50 is turned so far that the lever 48 displaces the slide 39until its recess 41 lies in front of the arm 38 of the stop-pawl, sothat this latter is not released. As the operation of the stop-pawlalways takes place automatically and only when a sheet is fed up, whileit equally re-l llOi) rug ermee mains suspended automatically when thisis not the case, the attendance on a machine provided With a gummingapparatus such as Working of the machine in consequence ofthe'application of gum Without there being a s eet of pa er fed up areentirely avoided.

It is evi ent that the sto -pawl or another stopping mechanism in t ecase Where a sheet has not been fed up may be prevented by the key Jromreleasing the gummingplate in other Ways than the one hereinbeforedescribed. The characteristic feature of the invention is regarded asthe arrangement of a key which When the paper sheet is not fed u passesinto recesses in the feed-table, and ty ereby automatically revents therelease of the stop-pawl or the ike. Of course it is also self-evidentthat it is not exactly necessary that the gumming-plate in itsforWard-and-backward movement should execute a rotation of ninetydegrees, and the gumming-plate may be fed up to the place to be gummedeither by a movement in a straight line or in any other suitable manner.

AHaving now particularly described and ascertained the nature of my saidinvention and in what manner the same is to be performed, I declare thatwhat I claim is- 1. In a machine of the class described, a sheet or bagsupport, a gum-applying member movable in the direction of said support,an operating-bar for transmitting movement to said member, alocking-pawl arranged to engage said bar, and a key or feeler arrangedto engage the sheet or bag and control the locking or release of thepawl.`

2. In a machine of the class described, a sheet or bag support, agum-applying member, a reciprocating bar for transmitting movementthereto, a locking-pawl ior said bar, means 'for releasin the pawl and ake or eeler movable over t e paper and contro ling the psitioaofthe'aWl-releasing device. 3. In a machine of t ef-classdescribei thecombination With a sheet or bag support, ofk a igum-applying member, areciprocatory barH r imparting movement thereto, a lockingpawl for thebar, a paWl-engaging slide having a slot for the reception oi said paWl,a key or feeler for engaging the sheet or ba and means connecting saidfeeler to the slidge.

4. In a machine of the class described, a sheet or bag support, agum-applying member, a reciprocatory bar for transmitting movementthereto, a lockingaWl for the bar, a pair of slides, one of Whic ismounted on the other, said slides being movable in the direction of thepaWl to eiect release of the same and one of said slides having a slotfor the reception ofthe paWl when the latter is to remain inactive, anda sheet or bag engaging feeler or key controlling the movement of saidslotted slide. 1

5. In a machine of the class described, the combination with agum-receptacle, of a roller mounted therein, a shaft, a reciprocatorysupport for the shaft, a gum-applying member carried by the'sha'ft andarranged to engage said roller, arocker-arm carried by the shaft, a pinon said rocker-arm, a member having a continuous cam-slot into whichsaid yantifriction-roller entera-and an adjustable arm forming one -Wallof said cam-slot and serving to adjust the delivery position of thegum-applying member.

In testimony whereof I hereunto aiiiX my signature in the presence oftwo Witnesses.

orro Hassan.

Witnesses:

A. B. FRANTZ, R. BREcHT.

